<template>
        <view class="goods_item">
          <!-- 商品左侧图片区域 -->
          <view class="goods_item_left">
            <radio :checked="goods.goods_state" color="#c000000" v-if="showRadio" @click="radioClickHandler"></radio>
            <image :src="goods.goods_small_logo || defaultPic" class="goods_pic"></image>
          </view>
          <!-- 商品右侧信息区域 -->
          <view class="goods_item_right">
            <!-- 商品标题 -->
            <view class="goods_name">{{goods.goods_name}}</view>
            <view class="goods_info_box">
              <!-- 商品价格 -->
              <view class="goods_price">￥{{goods.goods_price | tofixed}}</view>
              <!-- 商品数量 -->
              <uni-number-box :min="1" :value="goods.goods_count" v-if="showNum" @change="numChangeHandler"></uni-number-box>
            </view>
          </view>
        </view>
</template>

<script>
  export default {
    // 定义props属性，用来接受外界传递当前组件的数据
    props: {
      // 商品信息对象
      goods: {
        type: Object,
        default: {}
      },
      // 是否显示图片左侧的radio
      showRadio:{
        type:Boolean,
        default:false
      },
      // 是否展示价格右侧二的NumberBox组件
      showNum:{
        type:Boolean,
        default:false
      },
    },
    data() {
      return {
        // 默认的空图片
        defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    filters:{
      // 把数字处理为带两位小数点的数字
      tofixed(num){
        return Number(num).toFixed(2)
      }
    },
    methods:{
      radioClickHandler(){
        // 通过this.$emit()触发外界通过@绑定的radio-cahnge事件
        // 同时吧商品的id和勾选状态作为参数纯递给radio-change事件处理函数
        this.$emit('radio-change',{
          // 商品的id
          goods_id:this.goods.goods_id,
          // 商品最新的勾选状态
          goods_state:!this.goods.goods_state
        })
      },
      // numberBox组件的change世家处理函数
      numChangeHandler(val){
        // 通过￥emit触发外界通过@绑定的num-change事件
        this.$emit('num-change',{
          // 商品的id
          goods_id:this.goods.goods_id,
          // 商品最新数量
          goods_count: + val
        })
      }
    },
  }
</script>

<style lang="scss">
.goods_item {
  // 让goods——item占满整个屏幕的宽度
  width: 750rpx;
  // 设置盒子模型为border-box
  box-sizing: border-box;
  display:flex;
  padding: 10px 5px;
  border-bottom:1px solid #f0f0f0;
  .goods_item_left {
    margin-right: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    .goods_pic {
      width: 100px;
      height: 100px;
      display: block;
    }
  }
  .goods_item_right {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-between;
    .goods_name {
      font-size: 13px;
    }
    .goods_info_box {
      display:flex;
      align-items: center;
      justify-content: space-between;
    }
    .goods_price {
      font-size: 16px;
      color: #c00000;
    }
  }
}
</style>
